Twenty years have passed I am glad to find the local people in some undeveloped areas are

问题补充：

Twenty years have passed, I am glad to find the local people in some undeveloped areas are than they were before.

A. well off

B. badly off

C. worse off

D. better off

答案：

A. well off

B. badly off

C. worse off

(答案→)D. better off

解析：句意：二十年过去了，我很高兴地发现一些不发达地区的当地居民比他们以前富裕了。be well off 富裕，因为是和以前相比较，所以要用well 的比较级形式，即better。